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Okay, another one of those kinda stupid, kinda creative, possibly brilliant posts.
Do you have a dirty keyboard?  Are the letters starting to disappear behind a layer of dirt and grime?  Maybe it’s time to run your keyboard through the dishwasher.

It might or might not work.  Doing it more then once probably isn’t a good idea.  As long as it dries fully, it should be okay though.  Its usually repeated exposure to water that causes problems.  As a bit of common sense, don’t try this with a keyboard you’re not prepared to loose/replace.

Read more about the idea, the results, and waterproof keyboards here
http://www.npr.org/templates/
story/story.php?storyId=11029793&ps=bb1